Our trade: blown film

Blow extrusion – How does it work ?

Granulates are heated at high temperature (200°C for PE) and molded into a kind of paste. The plastic is conveyed forward by a rotating screw inside a heated barrel and softened by both friction and heat. The softened plastic is then forced upwards through a circular die in a shape of a hollow tube.

The tube is expanded with air above the die. Once cooled the tube is cut on both lateral sides and collapsed by nip rollers.

Changing the speed of the screw rotation and nip rollers will change the gauge of the film.







A mastered diversification





The films, tubs and plastic bags made by extrusion offer a lot of features. Leyagetch’s know-how and its permanent investment in research and development enable it to bring technicality, practicality and innovation to its semi-finished products, mainly destined for the agro-food industry and the Pharmacopoeia markets.







A modern technical park : investment of 7 million euros in 2017


A modern park of equipment within 3 workshops :Leygatech Yssingeaux

  • 23 extruders including 14 co-extruders (6 x 3 layers, 7 x 5 layers and 1 x 7 layers)
  • 4 Welders
  • 3 Printing Machines